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$352+ Cheap flights from Fremont, CA to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Sofia are usually found in January or October, booked 50 days in advance, depart on a Thursday or Sunday and return on a Saturday

Cheap flight deals from Fremont to Sofia

Keep the following information in mind while searching for Fremont to Sofia flight deals. Data was last updated June 12, 2025.

Round-trip from

$643
(Turkish Airlines)

One-way from

$359
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,524
From Fremont to Sofia
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One-way flight from Fremont to Sofia
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Highest demand for flights based on searches. 29% potential increase in price ($365 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($61 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Fremont to Sofia

Cheapest flights from Fremont to Sofia
Explore the most affordable flight options available from Fremont to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Turkish Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:45 pmSFO - SOF
1 stop27h 50mTurkish Airlines
Tue 8/199:25 amSOF - SFO
1 stop35h 10mTurkish Airlines
Deal found 6/12$643
This Gotogate deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/811:40 amSFO - SOF
2 stops20h 10mMultiple Airlines
Mon 9/223:30 pmSOF - SFO
1 stop34h 40mMultiple Airlines
Deal found 6/10$644
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/309:05 pmSFO - SOF
1 stop15h 55mUnited Airlines
Wed 8/206:15 amSOF - SFO
2 stops23h 32mUnited Airlines
Deal found 6/12$647
This Cheapflightsfares deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/284:31 pmSFO - SOF
2 stops20h 19mLufthansa
Thu 8/216:15 amSOF - SFO
1 stop16h 25mLufthansa
Deal found 6/10$659
This CheapOair deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3111:45 pmSFO - SOF
2 stops27h 15mAir Canada
Wed 10/16:15 amSOF - SFO
2 stops21h 24mAir Canada
Deal found 6/10$682
This SWISS deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/87:30 pmSFO - SOF
1 stop28h 35mSWISS
Mon 10/63:30 pmSOF - SFO
2 stops57h 58mSWISS
Deal found 6/12$684
This Cheapflightsfares deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/289:05 pmSFO - SOF
2 stops16h 50mAustrian Airlines
Thu 8/216:55 pmSOF - SFO
2 stops27h 45mAustrian Airlines
Deal found 6/12$688
This British Airways deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:44 pmSFO - SOF
2 stops35h 36mBritish Airways
Sun 9/289:10 pmSOF - SFO
1 stop26h 40mBritish Airways
Deal found 6/11$761
This KLM deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/210:00 amSFO - SOF
2 stops18h 00mKLM
Wed 8/277:00 amSOF - SFO
2 stops21h 05mKLM
Deal found 6/12$771
This Trip.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:15 pmSFO - SOF
1 stop34h 50mITA Airways
Mon 8/1112:55 pmSOF - SFO
1 stop34h 30mITA Airways
Deal found 6/12$936

Cheapflights Fare Finder

Customize your flight search to find flights from Fremont to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Fremont to Sofia that are best for you.

Fly from

Fremont

Fly to

Sofia

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 8/4

6:45 pm-8:35 am

1 stop27h 50m

Sofia

Tue 8/19

9:25 am-10:35 am

1 stop35h 10m

$643

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 9/8

11:40 am-5:50 pm

2 stops20h 10m

Sofia

Mon 9/22

3:30 pm-4:10 pm

1 stop34h 40m

$644

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 7/30

9:05 pm-11:00 pm

1 stop15h 55m

Sofia

Wed 8/20

6:15 am-7:47 pm

2 stops23h 32m

$647

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 7/28

4:31 pm-10:50 pm

2 stops20h 19m

Sofia

Thu 8/21

6:15 am-12:40 pm

1 stop16h 25m

$659

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 8/31

11:45 pm-1:00 pm

2 stops27h 15m

Sofia

Wed 10/1

6:15 am-5:39 pm

2 stops21h 24m

$682

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 9/8

7:30 pm-10:05 am

1 stop28h 35m

Sofia

Mon 10/6

3:30 pm-3:28 pm

2 stops57h 58m

$684

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 7/28

9:05 pm-11:55 pm

2 stops16h 50m

Sofia

Thu 8/21

6:55 pm-12:40 pm

2 stops27h 45m

$688

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Fri 9/12

10:44 pm-8:20 pm

2 stops35h 36m

Sofia

Sun 9/28

9:10 pm-1:50 pm

1 stop26h 40m

$761

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sat 8/2

10:00 am-2:00 pm

2 stops18h 00m

Sofia

Wed 8/27

7:00 am-6:05 pm

2 stops21h 05m

$771

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 8/4

3:15 pm-12:05 pm

1 stop34h 50m

Sofia

Mon 8/11

12:55 pm-1:25 pm

1 stop34h 30m

$936

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 16 results
1
2

Best time to book a flight from Fremont to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Fremont with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fremont to Sofia

How far ahead should I book a flight from Fremont to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Sofia. Price data was last updated on June 9, 2025.

The price you pay for your flight from Fremont to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 50 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Fremont to Sofia?

Currently, November is the cheapest month in which you can book a flight from Fremont to Sofia (average of $632). Flying from Fremont to Sofia in June is currently the most expensive (average of $1,203). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from FR8 to SOF?

Find hourly flight availability from Fremont to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Fremont to Sofia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Fremont to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Fremont to Sofia. Price data was last updated on October 13, 2024.

Travelers seeking maximum savings on their Fremont to Sofia flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with KLM, Austrian Airlines and SWISS from Fremont to Sofia to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Austrian Airlines
7.6
Good
802 reviews
KLM
7.8
Good
1,358 reviews

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
SWISS
7.5
Good
1,623 reviews
KLM
7.8
Good
1,358 reviews

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
United Airlines
7.4
Good
8,790 reviews
KLM
7.8
Good
1,358 reviews

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Turkish Airlines
7.3
Good
3,848 reviews
KLM
7.8
Good
1,358 reviews

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

Related info for your journey

Find useful and relevant information for your journey from Fremont to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Fremont?

    Sofia (SOF) is the airport you will fly into if you book a flight from Fremont to Sofia. You should not have trouble finding flights to Sofia from Fremont; the airport handles an average of 0 inbound flights from Fremont per day. You should also have plenty of airline options to choose from since 7 airlines have flights to the Sofia airport from Fremont. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • What are the cheapest airlines to fly from Fremont to Sofia one-way?

    One-way options have recently been found by users for as low as $474 on United Airlines. Other airlines that offer cheap prices include Turkish Airlines from $1,113 and British Airways from $1,152 one-way.

  • Can I find deals for flights from Fremont to Sofia that include hotel bookings?

    Yes. In addition to deals on Fremont to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fremont to Sofia.

  • Can I find deals for business class flights from Fremont to Sofia?

    Yes. Cheapflights offers flight deals from Fremont to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fremont to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Fremont to Sofia (average of $632). Flying from Fremont to Sofia in June is currently the most expensive (average of $1,203). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 7 airlines flying from Fremont to Sofia

Discover the top 7 airlines that operate flights from Fremont to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$560Average$1,126FlexibilityNo cancel feeOn-time79%
British AirwaysCheapest$578Average$731FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$583Average$703FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$627Average$1,039FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$651Average$1,543FlexibilityNo cancel feeOn-time81%
LufthansaCheapest$655Average$1,055FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$842Average$1,133FlexibilityNo cancel feeOn-time67%

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